tSystem Standard properties

Use home directory

Select this check box to change the name and path of a dedicated directory.

Use Single Command

When the required command is very simple, to the degree that, for example, only one parameter is used and without space, select this option to activate its Command field. In this field, enter the simple system command. Note that the syntax is not checked.

Use Array Command

Select this option to activate its Command field. In this field, enter the system command in array, one parameter per line.

                        "cp"
                        "/temp/source.txt"
                        "/temp/copy  to/"
                     

Standard Output and Error Output

Select the type of output for the processed data to be transferred to.

to console: data is passed on to be viewed in the Run view.

to global variable: data is passed on to an output variable linked to the tSystem component.

to console and to global variable: data is passed on to the Run view and to an output variable linked to the tSystem component.

normal: data is passed on to the component that comes next.

Schema and Edit Schema

A schema is a row description, it defines the number of fields to be processed and passed on to the next component. The schema is either Built-in or stored remotely in the Repository.

Click Edit schema to make changes to the schema. If the current schema is of the Repository type, three options are available:

• View schema: choose this option to view the schema only.

• Change to built-in property: choose this option to change the schema to Built-in for local changes.

• Update repository connection: choose this option to change the schema stored in the repository and decide whether to propagate the changes to all the Jobs upon completion. If you just want to propagate the changes to the current Job, you can select No upon completion and choose this schema metadata again in the Repository Content window.

Click Sync columns to retrieve the schema from the preceding component in the Job.

Built-in: You create and store the schema locally for this component only. Related topic: see Talend Studio User Guide.

Repository: You have already created the schema and stored it in the Repository. You can reuse it in various projects and Job flowcharts. Related topic: see Talend Studio User Guide.

Environment variables

Click the [+] button to add as many global variables as needed.

name: Enter the syntax of the new variable.

value: Enter a value for this variable according to the context.

tStatCatcher Statistics

Select this check box to collect log data at the component level.

Global Variables

ERROR_MESSAGE: the error message generated by the component when an error occurs. This is an After variable and it returns a string. This variable functions only if the Die on error check box is cleared, if the component has this check box.

OUTPUT: the standard output from a process. This is an After variable and it returns a string.

ERROROUTPUT: the erroneous output from a process. This is an After variable and it returns a string.

EXIT_VALUE: the exit code from a process. This is an After variable and it returns an integer.

A Flow variable functions during the execution of a component while an After variable functions after the execution of the component.

To fill up a field or expression with a variable, press Ctrl + Space to access the variable list and choose the variable to use from it.

For further information about variables, see Talend Studio User Guide.

Usage rule

This component can typically used for companies which already implemented other applications that they want to integrate into their processing flow through Talend.

Connections

Outgoing links (from this component to another):

Row: Main.

Trigger: On Subjob Ok; On Subjob Error; Run if.

Incoming links (from one component to this one):

Row: Main; Reject; Iterate.

Trigger: On Subjob Ok; On Subjob Error; Run if; On Component Ok; On Component Error; Synchronize; Parallelize.

For further information regarding connections, see Talend Studio User Guide.